Perturbation of Neptune

In the 19th century Leverrier predicted a trans-Uranus planet from the
observed perturbations of the orbit of Uranus and the 8th planet Neptune
was found by Galle close to the predicted position. Later on
perturbations of the orbit of Neptune had been observed and adopted as a
hint of a trans-Neptune planet. The "dwarf" planet Pluto discovered by
Tombaugh, however, was too small to be the origin of the perturbations
of Neptune.

What is the present status of the problem? Could these perturbations
originate from members of the Kuiper belt? Or have the perturbation date
of Neptune be revised?

All the best Jurgen

In article ,
Juergen Barsuhn wrote:

In the 19th century Leverrier predicted a trans-Uranus planet from the
observed perturbations of the orbit of Uranus and the 8th planet Neptune
was found by Galle close to the predicted position. Later on
perturbations of the orbit of Neptune had been observed and adopted as a
hint of a trans-Neptune planet.

No - it was further pertorbations of Uranus, not fully accounted by
Neptune, which the observers of that time believe they had observed.

The "dwarf" planet Pluto discovered by Tombaugh, however, was too small
to be the origin of the perturbations of Neptune.

What is the present status of the problem? Could these perturbations
originate from members of the Kuiper belt? Or have the perturbation date
of Neptune be revised?

All the best Jurgen

Those perturbations were artefacts of the observing techniques of those
times. A modern reexamination of those observations, which also accounts
for modern observations, show that no deviations are observed which indicates
some large unknown Planet X. Check out e.g.:

http://discovermagazine.com/1993/sep/planetxisdead271
http://query.nytimes.com/gst/fullpag...gewanted=print

and the original paper can be found he

http://adsbit.harvard.edu/cgi-bin/np...J....105.2000S

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Paul Schlyter, Grev Turegatan 40, SE-114 38 Stockholm, SWEDEN
e-mail: pausch at stockholm dot bostream dot se
WWW: http://stjarnhimlen.se/

Dear Paul,

thank you very much for the evidence (with links) that there is no large
unknown trans-Neptunian planet.

Hjärtligt tack och manga hälsningar Jürgen

Paul Schlyter wrote:
In article ,
Juergen Barsuhn wrote:


In the 19th century Leverrier predicted a trans-Uranus planet from the
observed perturbations of the orbit of Uranus and the 8th planet Neptune
was found by Galle close to the predicted position. Later on
perturbations of the orbit of Neptune had been observed and adopted as a
hint of a trans-Neptune planet.


No - it was further pertorbations of Uranus, not fully accounted by
Neptune, which the observers of that time believe they had observed.


The "dwarf" planet Pluto discovered by Tombaugh, however, was too small
to be the origin of the perturbations of Neptune.

What is the present status of the problem? Could these perturbations
originate from members of the Kuiper belt? Or have the perturbation date
of Neptune be revised?

All the best Jurgen


Those perturbations were artefacts of the observing techniques of those
times. A modern reexamination of those observations, which also accounts
for modern observations, show that no deviations are observed which indicates
some large unknown Planet X. Check out e.g.:

http://discovermagazine.com/1993/sep/planetxisdead271
http://query.nytimes.com/gst/fullpag...gewanted=print

and the original paper can be found he

http://adsbit.harvard.edu/cgi-bin/np...J....105.2000S